Granted Patent
Utility
US 5,199,830 · App. 07/741,427
Printed circuit board presser device in drilling machine
Inventors:
Tamio Otani, Kazuhiro Kogure, Kunio Arai, Yasuhiko Kanaya, Kazunori Hamada
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Aug 1, 1991
Inventors
Tamio Otani
Kazuhiro Kogure
Kunio Arai
Yasuhiko Kanaya
Kazunori Hamada
Assignee (at issue)
Hitachi Seiko Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.